Load receiver with improved fixing means

Abstract

This invention relates to load receivers in which a solid member with a constriction supplies the opposing elastic force. The connection between this solid member and the remainder of the load receiver is produced exclusively by pairs of bolts, tightly housed in bores of the solid member; each pair of bolts co-operates moreover with a part of the load receiver which has a lower rigidity than that of the material constituting the solid member. Such load receivers can be used in weighing apparatus.

We claim: 
     
       1. A load receiver for use in a weighing scale or the like comprising: a solid member having opposed lateral surfaces and at least one constricted zone arranged to provide an elastic response to stresses;   first and second support members, each of said support members including opposed connector portions for supporting said solid member therebetween; and   attachment means rigidly connecting said connector portions to said solid member with said connector portions in fixed spaced relationship with the lateral surfaces of said solid member.   
     
     
       2. A load receiver according to claim 1, wherein at least one bore is formed in said solid member on each side of said constricted zone in the vicinity of the centre axial zone of the solid member, and said attachment means are positioned in said bores. 
     
     
       3. A load receiver according to claim 2, wherein said attachment means are substantially positioned on the neutral line in deformation of the solid member. 
     
     
       4. A load receiver according to claim 1, wherein said attachment means comprise bolts positioned in pairs substantially symmetrically along the axis of the solid member, on an interval separating one zone of the constriction type from another constricted zone or from an end of the solid member. 
     
     
       5. A load receiver according to claim 1, wherein said solid member comprises an integral loop with four constrictions forming a deformable parallelogram, and wherein two opposite parts of said loop are connected by a pair of bolts respectively to said first support member and to said second support member. 
     
     
       6. A load receiver according to claim 5, which also comprises a capacitive transducer rigidly connected to said opposite parts of said loop between the said pairs of bolts, and wherein the said pairs of bolts are positioned at a slight distance from the constrictions, while still maintaining the elastic qualities thereof. 
     
     
       7. A load receiver according to claim 1, wherein the solid member is a bending blade with a single constriction, and said support members comprise lever members, both sides of this constriction being acted on by said lever members which are mounted substantially symmetrically in articulation on one side with the frame of a weighing scale and on the other side with the load-carrying plate of said scale, and wherein the lever members are each connected to the bending blade by a pair of bolts. 
     
     
       8. A load receiver according to claim 7, which also comprises a capacitive transducer rigidly connected to the bending blade on both sides of the constriction thereof and in the immediate vicinity of the latter, and wherein said bolts are positioned at a sufficient distance from the constriction so as not to disturb the elastic behaviour of the bending blade where the capacitive transducer is supported.